我不太熟悉React和Redux。我对Gutenberg在save函数中获取withState变量的值有问题。这是我的代码：

edit( {attributes, setAttributes, className} ) {

    var link_text = attributes.link_text;
    var link_url = attributes.link_url;
    var svg_url = attributes.svg_url;
    var template_url = ww_blocks.templateUrl;
    var hasExternalURL = attributes.hasExternalURL;

    function onChangeLinkText ( content ) {
        setAttributes({link_text: content})
    }

    function onChangeLinkURL ( content ) {
        setAttributes({link_url: content})
    }

    setAttributes({svg_url: template_url + \'/img/icons.svg#button-next\'});

    const LinkToggleControl = withState( {
                hasExternalURL: false,
    } )( ( { hasExternalURL, setState } ) => (
        <ToggleControl
            label="Externer Link"
            help={ hasExternalURL ? \'Es ist ein externer Link.\' : \'Kein externer Link.\' }
            checked={ hasExternalURL }
            onChange={ () => setState( ( state ) => ( { hasExternalURL: ! state.hasExternalURL } ) ) }
        />
    ) );

        return ([
        <InspectorControls>
          <PanelBody title="Link Parameter">
            <div id="ww-container-inspector-control-wrapper">
              <label class="blocks-base-control__label" for="mce_1">Link Text</label>
              <TextControl
                onChange={onChangeLinkText} // onChange event callback
                value={link_text} // Input Binding
                />
              <label class="blocks-base-control__label" for="mce_2">Link URL</label>
              <TextControl
                onChange={onChangeLinkURL} // onChange event callback
                value={link_url} // Input Binding
                />
              <LinkToggleControl />
            </div>
          </PanelBody>
        </InspectorControls>,
        <div className={ className }>
          <a class="btn btn-std" href="#">
            <svg role="img" class="symbol" aria-hidden="true" focusable="false">
              <use href={svg_url}></use>
            </svg>
            <span>{link_text}</span>
          </a>
        </div>
    ]);
    },

    save( { attributes } ) {

        return (
        <a className="btn btn-std" href={attributes.link_url} target={ attributes.hasExternalURL ? \'_blank\' : \'\' } title={ attributes.hasExternalURL ? \'Seite öffnet in neuem Fenster\' : \'\' }>
          <svg role="img" class="symbol" aria-hidden="true" focusable="false">
            <use href={attributes.svg_url}></use>
          </svg>
          <span>{attributes.link_text}</span>
        </a>
        );
    },
} );